Home / 81,162.38-121,787.18-39,609.38

Finding the Fourth Proportional to 81,162.38, 121,787.18 and 39,609.38

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Solution

The fourth proportional to 81,162.38, 121,787.18 and 39,609.38 is: 59,435.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,162.38 : 121,787.18 = 39,609.38 : x
  2. Step 2: Convert to fraction form
    81,162.38/121,787.18 = 39,609.38/x
  3. Step 3: Cross multiply
    81,162.38x = 121,787.18 × 39,609.38
  4. Step 4: Simplify right side
    81,162.38x = 4,823,914,691.75
  5. Step 5: Solve for x
    x = 4,823,914,691.75/81,162.38
  6. Step 6: Final answer
    x = 59,435.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.